lkml.org 
[lkml]   [2014]   [Dec]   [18]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[PATCH v2 02/12] MIPS: OCTEON: Fix FP context save.
Date
From: David Daney <david.daney@cavium.com>

It wasn't being saved on task switch.

Signed-off-by: David Daney <david.daney@cavium.com>
Signed-off-by: Aleksey Makarov <aleksey.makarov@auriga.com>
---
arch/mips/kernel/octeon_switch.S | 19 +++++++------------
1 file changed, 7 insertions(+), 12 deletions(-)

diff --git a/arch/mips/kernel/octeon_switch.S b/arch/mips/kernel/octeon_switch.S
index 3dec1e8..2787c01 100644
--- a/arch/mips/kernel/octeon_switch.S
+++ b/arch/mips/kernel/octeon_switch.S
@@ -31,15 +31,11 @@
/*
* check if we need to save FPU registers
*/
- PTR_L t3, TASK_THREAD_INFO(a0)
- LONG_L t0, TI_FLAGS(t3)
- li t1, _TIF_USEDFPU
- and t2, t0, t1
- beqz t2, 1f
- nor t1, zero, t1
-
- and t0, t0, t1
- LONG_S t0, TI_FLAGS(t3)
+ .set push
+ .set noreorder
+ beqz a3, 1f
+ PTR_L t3, TASK_THREAD_INFO(a0)
+ .set pop

/*
* clear saved user stack CU1 bit
@@ -57,14 +53,13 @@
1:

/* check if we need to save COP2 registers */
- PTR_L t2, TASK_THREAD_INFO(a0)
- LONG_L t0, ST_OFF(t2)
+ LONG_L t0, ST_OFF(t3)
bbit0 t0, 30, 1f

/* Disable COP2 in the stored process state */
li t1, ST0_CU2
xor t0, t1
- LONG_S t0, ST_OFF(t2)
+ LONG_S t0, ST_OFF(t3)

/* Enable COP2 so we can save it */
mfc0 t0, CP0_STATUS
--
2.1.3


\
 
 \ /
  Last update: 2014-12-18 12:01    [W:0.040 / U:0.276 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site